* DigiKey: Skip empty values
* Move improved range detection from LCSCProvider to ParameterDTO class
Improve numeric value detection by moving extra info to value_text
* ParameterDTO: Add micro unit prefix
* Bring $value_text2 to a defined state
* ParameterDTO: Don't overwrite $unit if it's not empty
* ParameterDTO: Don't overwrite $unit if it's not empty
* Correct some inaccuacies in comments
* Added tests and fixed certain edge cases in parsing parameters
* Added more tests for parameter parsing
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Co-authored-by: Jan Böhmer <mail@jan-boehmer.de>
